Ergonomic controller thumbstick



FIG. 1 is a front perspective view of an ergonomic controller thumbstick showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is another bottom perspective view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side elevational view thereof;

FIG. 7 is another side elevational view thereof; and,

FIG. 8 is a sectional view thereof, taken along line 8-8 of FIG. 4.

The broken line showing of an image depicted in FIGS. 1-8 is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for an ergonomic controller thumbstick, as shown and described. 